Cylinder Liner
Thread Starter
1st Gear
Joined: May 2017
Posts: 1
Likes: 0
Cylinder Liner
I was getting my engine overhauled , Cummins QSM 11 , and bought a complete EOK.
The mechanic checked the LINERS before installing and suspected two were cracked.I asked him why he thought so as no crack was visible.He said it was a practical test by hitting /sounding a wrench lightly on the liner. Is that how you can tell?
The mechanic checked the LINERS before installing and suspected two were cracked.I asked him why he thought so as no crack was visible.He said it was a practical test by hitting /sounding a wrench lightly on the liner. Is that how you can tell?
Race Car
Joined: Nov 2014
Posts: 3,890
Likes: 162
From: Melbourne, Australia
Trending Topics
Race Director
Joined: Sep 2006
Posts: 19,031
Likes: 268
From: Bentonville, AR
I was getting my engine overhauled , Cummins QSM 11 , and bought a complete EOK.
The mechanic checked the LINERS before installing and suspected two were cracked.I asked him why he thought so as no crack was visible.He said it was a practical test by hitting /sounding a wrench lightly on the liner. Is that how you can tell?
The mechanic checked the LINERS before installing and suspected two were cracked.I asked him why he thought so as no crack was visible.He said it was a practical test by hitting /sounding a wrench lightly on the liner. Is that how you can tell?
The liners are infused with cast aluminum and can sound different when "tested" by hitting them with a wrench handle. How the wrench is handled/gripped can affect the sound too.
There is a dye test for checking aluminum parts for cracks. Or one can have the castings tested via ultrasonic testing, too. This 2nd technique can find cracks that have not reached the surface.
If you are concerned look into having the cast aluminum parts tested ultrasonically (first choice) or by penetrant dye (2nd choice).
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
9 Vehicles Porsche Helped Engineer that Aren't Porsches
Verdad Gallardo
9 Features and Characteristics That Only Porsche People Understand
Verdad Gallardo
I've Written 500 Rennlist Articles: Here's How Porsche Has Changed Along the Way
Joe Kucinski
10 Most Unnecessary Porsches Ever Built (And Why We Love Them)
Verdad Gallardo
Porsche 911 GT3 S/C vs 718 Spyder RS: 10 Categories, One Winner
Joe Kucinski
This Builder Is Turning Heads With Its Slantnose 911 Creation
Verdad Gallardo
Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture
Verdad Gallardo
Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look
Verdad Gallardo
10 Porsche Colors That Have More Personality Than Most People
Verdad Gallardo
Rennlist Member
Joined: Jun 2016
Posts: 1,084
Likes: 496
From: Fair Oaks, CA
I retired as a Cummins factory trainer, don't know where you got the info of aluminum being infuse in the QSM or ISM liner. I wouldn't accept the method of checking the liner by banging it with a wrench 
if you suspect it of being crack, use a NDT (non destructive testing) are you using OEM liners and pistons ? I don't ever remember having a liner issue with the QSM or ISM. I've been involved in many overhauls and done many of them.
if you suspect it of being crack, use a NDT (non destructive testing) are you using OEM liners and pistons ? I don't ever remember having a liner issue with the QSM or ISM. I've been involved in many overhauls and done many of them.
Race Director
Joined: Jun 2013
Posts: 11,371
Likes: 471
From: Oceanside/Vista (N. San Diego County), CA
Apparently the motor in question is for a boat.
OP doesn't seem to know whether he's cummins or goins.
Cummins QSM11 220-526 kW | 295-705 hp. Proven acceleration and torque performance in thousands of boats.
Rennlist Member
Joined: Jun 2016
Posts: 1,084
Likes: 496
From: Fair Oaks, CA
QSM engine can be used on anything off-road, such as heavy equipment, generators, and also boats. ISM is for on-road, the ISM plants got moved to China since they haven't met emissions since the start of 2010.
Race Director
Joined: Sep 2006
Posts: 19,031
Likes: 268
From: Bentonville, AR
I retired as a Cummins factory trainer, don't know where you got the info of aluminum being infuse in the QSM or ISM liner. I wouldn't accept the method of checking the liner by banging it with a wrench if you suspect it of being crack, use a NDT (non destructive testing) are you using OEM liners and pistons ? I don't ever remember having a liner issue with the QSM or ISM. I've been involved in many overhauls and done many of them.
if you suspect it of being crack, use a NDT (non destructive testing) are you using OEM liners and pistons ? I don't ever remember having a liner issue with the QSM or ISM. I've been involved in many overhauls and done many of them.We don't get many Cummins engine questions here and my guard was down and I missed the fact the OP was referring to a Cummins engine and not a Porsche engine.